linux-kernel - Re: [ 105/128] efi: Make efi_enabled a function to query EFI facilities

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Message-ID: <20130205154026.GA2335@fenchurch.internal.datastacks.com>
Date:	Tue, 5 Feb 2013 10:40:26 -0500
From:	Peter Jones <pjones@...hat.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	Matt Fleming <matt.fleming@...el.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	akpm@...ux-foundation.org, David Airlie <airlied@...ux.ie>,
	Corentin Chary <corentincj@...aif.net>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Dave Jiang <dave.jiang@...el.com>,
	Olof Johansson <olof@...om.net>,
	Colin Ian King <colin.king@...onical.com>,
	Steve Langasek <steve.langasek@...onical.com>,
	Tony Luck <tony.luck@...el.com>,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: [ 105/128] efi: Make efi_enabled a function to query EFI
 facilities

On Tue, Feb 05, 2013 at 03:46:04AM +0000, Ben Hutchings wrote:
> On Mon, 2013-02-04 at 16:44 +0000, Matt Fleming wrote:
> > On Sun, 2013-02-03 at 16:15 +0100, Ben Hutchings wrote:
> > > As you can see this needed quite a lot of work to backport, and I
> > > haven't been able to test it yet.  So I would particularly appreciate
> > > careful review of this.
> > 
> > Everything looks fine to me but I haven't actually booted with these
> > changes.
> 
> Thanks.  I've now tested this on a 64-bit EFI system myself:
> 
> x86_64 kernel build:
> - Boots successfully
> - x86_efi_facilities = 0x3f
> - efifb works
> - efivars can be loaded and creates /sys/firmware/efi/vars
> 
> i386 kernel build:
> - Boots as far as an initramfs shell, but the machine doesn't have an
> i386 installation to continue with
> - x86_efi_facilities = 0x21
> - efifb works
> - efivars can be loaded but does nothing
> 
> All of which I think is correct.

Yeah, if it's running 64-bit EFI, that looks correct.

-- 
        Peter
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